Census 2010: Washington › King County

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(Mapping 100 largest census tracts, by 2010 population.)

King County

Square miles: 2,306.9 Population per sq. mile: 912.9

  • 2010 population: 1,931,249
  • 2000 population: 1,737,034
  • Total change: 194,215 (11.2%)

See all Washington counties

2010 population by race/ethnicity

Diversity Index: 54.9%
The USA TODAY Diversity Index represents the probability that two people from this area will have different ethnic backgrounds. A higher number reflects a more ethnically diverse population.

Age breakdown Median: 37.1 years old

King County population

Race/ethnicity2010 population2010 percentage2000 population2000 percentage2000-2010 change
White1,325,84568.7%1,315,50775.7%0.8%
Black119,8016.2%93,8755.4%27.6%
American Indian/Alaska Native16,1470.8%15,9220.9%1.4%
Asian282,07514.6%187,74510.8%50.2%
Native Hawaiian/Pacific Islander14,4860.8%9,0130.5%60.7%
Other race76,0963.9%44,4732.6%71.1%
Two or more races96,7995.0%70,4994.1%37.3%
Total1,931,249100%1,737,034100%11.2%
*Hispanic origin172,3788.9%95,2425.5%81.0%

*Residents of Hispanic origin can be of any race.

Ages 0-17

Population: 414,000 (21.4%)

Diversity Index: 72.0%

Ages 18+

Population: 1,517,747 (78.6%)

Diversity Index: 53.9%

Race/ethnicityAges 0-17% of 0-17 totalAges 18+% of 18+ total
White242,00058.5%1,083,92171.4%
Black32,9008.0%86,9015.7%
American Indian/Alaska Native3,9501.0%12,2010.8%
Asian59,70014.4%222,32714.6%
Native Hawaiian/Pacific Islander4,5801.1%9,9050.7%
Other race25,2006.1%50,9243.4%
Two or more races45,20010.9%51,5683.4%
Total414,000100%1,517,747100%
*Hispanic origin59,30014.3%113,0797.4%

*Residents of Hispanic origin can be of any race.

Gender
Male2010
Population962,090 (49.8%)
Median age36.3
Female2010
Population969,159 (50.2%)
Median age37.9
Age breakdown by gender
AgePopulation% of totalMale% of male totalFemale% of female total
Under 10233,00012.1%119,00012.4%114,00011.8%
10 to 19 years229,00011.9%117,00012.2%111,00011.5%
20 to 29 years291,00015.1%147,00015.3%143,00014.8%
30 to 39 years301,00015.6%153,00015.9%148,00015.3%
40 to 49 years296,00015.3%150,00015.6%145,00015.0%
50 to 59 years269,00013.9%134,00013.9%136,00014.0%
60 to 69 years169,0008.8%81,6008.5%87,7009.0%
70 to 79 years80,6004.2%36,4003.8%44,2004.6%
80 and older62,7003.2%22,6002.4%40,1004.1%
Total1,931,249100%962,090100%969,159100%

*Residents of Hispanic origin can be of any race.

Housing Units
Owner-occupied2010
Population1,204,072
Avg. household size2.6
Renter-occupied2010
Population690,046
Avg. household size2.1
Vacancies
Vacancy Rate2010
Owner-occupied properties2.6%
Renter-occupied properties7.4%
Overall vacancy rate7.3%
Housing Units2010% of total
Occupied789,23292.7%
Vacant62,029 7.3%
For rent25,8123.0%
Rented, but unoccupied1,7780.2%
For sale12,7501.5%
Sold, but unoccupied2,3370.3%
Seasonal use only8,1121.0%
Other vacant units11,2401.3%
Total851,261100%
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Credits: Ryan Pitts, Mike Tigas Special thanks: USA Today Census team